单项选择题

(A) heat exchanger is a device (in) which (heat taken) from a hot liquid or gas in order to warm a (cold place).（）

A.A
B.in
C.heat taken
D.cold place

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单项选择题

(To many early Americans), chicken on the table represented fancy (civilized) food and suggested (that) a farmer and his wife (has found) prosperity.（）

A.To many early Americans
B.civilized
C.that
D.has found

单项选择题

It amazes me that she's got the energy for all those parties.（）

A．terrifies
B．frightens
C．amuses
D．surprises

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